- vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27543] TCP J06461075+2502415: new WZ Sge-type dwarf nova
by tonny.vanmunster＠gmail.com 25 Mar '23

25 Mar '23

Dear colleagues, I have just finished analysing my unfiltered CCD observations of TCP J06461075+2502415, obtained on Mar 24/25, 2023 at CBA Extremadura Observatory (Spain), using a 0.40-m f/5.1 telescope and SX-46 CCD camera under moderate skies. I have been observing this object for multiple nights since its discovery announcement on Mar 14, 2023 by Yuji Nakamura. On all previous nights, no obvious modulations were visible in the light curve. TCP J06461075+2502415 finally started showing superhumps on Mar 24/25, 2023. The superhumps have an amplitude of 0.26 mag. A period analysis using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0), yields a combined superhump period of 0.0592 +/- 0.0012d. The object was at mag CV = 16.0 on Mar 24th. The superhump profile shows no signs of a double-waved pattern, but the large outburst amplitude, combined with the long time for superhumps to develop (approx. 10 days) are strong signatures of a WZ Sge-type dwarf nova. Follow-up observations are recommended to further track the evolution of the superhumps. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.com PERANSO : The Light Curve and Period Analysis Software http://www.peranso.com

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[vsnet-alert 27542] CC Cnc: slowly rising outburst
by Taichi Kato 25 Mar '23

25 Mar '23

CC Cnc: slowly rising outburst Superoutburst in 2022 Oct.-Nov. YYYYMMDD(UT) mag observer 20230312.8639 17.665o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8671 17.605o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8735 17.729o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.8839 17.653o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230313.6247 <161c (Yutaka Maeda) 20230313.6829 <169C (Masayuki Moriyama) 20230313.8194 <141 (Eddy Muyllaert) 20230314.0827 18.321o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0911 18.100o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.0938 17.993o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.1012 18.032o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.1045 18.282o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.1125 18.002o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.4190 18.039o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.4222 18.210o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.4276 18.254o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.4380 18.421o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.5949 <157c (Yutaka Maeda) 20230314.597 181C (Mitsutaka Hiraga) 20230314.6593 <173C (Masayuki Moriyama) 20230314.891 <156 (Gary Poyner) 20230315.3485 18.761o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3522 18.617o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3576 18.574o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.3678 18.520o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230315.6110 <159c (Yutaka Maeda) 20230316.9054 18.130c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.9156 17.855c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.974 <149 (Gary Poyner) 20230318.0766 17.953o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0858 17.472o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0890 18.123o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0926 17.892o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.0948 17.543o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.1296 17.578o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.1300 17.477o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3404 18.059o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3438 17.715o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3493 17.767o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.3619 17.791o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.9118 <141 (Eddy Muyllaert) 20230319.024 <156 (Gary Poyner) 20230319.0618 170C (Masao Funada) 20230319.062 17.21C (Gary Poyner) 20230319.2372 17.609o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.2390 17.822o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.2422 17.574o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.2508 17.552o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230319.5944 166C (Masayuki Moriyama) 20230321.8590 <141 (Eddy Muyllaert) 20230322.0839 15.795o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.0866 15.836o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.0924 15.641o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.1022 15.530o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.017 <149 (Gary Poyner) 20230323.458 146 (Rod Stubbings) 20230325.467 153 (Rod Stubbings)

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[vsnet-alert 27541] V2109 Oph outburst (old nova)
by Taichi Kato 25 Mar '23

25 Mar '23

V2109 Oph outburst (old nova) Similar to the 2022 outburst. Porb=1.32379 d YYYYMMDD(UT) mag observer 20230311.1138 18.020o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.3650 17.950o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.3682 17.808o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230312.4033 18.054o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.3603 17.667o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.3634 17.715o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.3689 17.877o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.3752 17.775o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.3661 17.851o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.3679 17.853o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.3719 17.851o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.3821 17.701o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27540] ASASSN-15kt outburst
by Taichi Kato 25 Mar '23

25 Mar '23

ASASSN-15kt outburst Super? YYYYMMDD(UT) mag observer 20230317.3865 15.710o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.3906 15.693o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.3947 15.682o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.4031 15.582o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230317.4115 15.617o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1117 15.945c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1145 15.949c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.3851 16.080o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.4006 16.190o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230321.4046 16.133o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27539] ASASSN-15ku outburst
by Taichi Kato 25 Mar '23

25 Mar '23

ASASSN-15ku outburst Super? YYYYMMDD(UT) mag observer 20230322.1883 15.183o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.1920 15.141o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.2000 15.169o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.2354 15.213o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.3367 15.348o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.3398 15.345o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230323.3429 15.359o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27538] ASASSN-15ap superoutburst?
by Taichi Kato 24 Mar '23

24 Mar '23

ASASSN-15ap superoutburst? (But rather faint) 20230318.7967 15.986c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.8000 16.000c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.8054 16.005c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.8183 15.970c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0701 16.286o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0705 16.273o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0733 16.321o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0737 16.318o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0787 16.263o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0792 16.291o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0892 16.322o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0983 16.305o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27537] ASASSN-14ff very likely superoutburst
by Taichi Kato 24 Mar '23

24 Mar '23

ASASSN-14ff very likely superoutburst Known SU UMa star. Relatively frequent superoutbursts. YYYYMMDD(UT) mag observer 20230323.405 149 (Rod Stubbings)

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[vsnet-alert 27536] Re: ASASSN-16dc most likely superoutburst
by Taichi Kato 24 Mar '23

24 Mar '23

Re: ASASSN-16dc most likely superoutburst > Type from ATLAS data. Known SU UMa star. Superoutburst in 2021.

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[vsnet-alert 27535] ASASSN-16dc most likely superoutburst
by Taichi Kato 24 Mar '23

24 Mar '23

ASASSN-16dc most likely superoutburst Type from ATLAS data. YYYYMMDD(UT) mag observer 20230310.9206 18.640o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.8490 18.819c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.8542 18.839c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.8581 19.054c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230314.8795 19.529c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.0827 18.815o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.0859 18.646o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.0917 18.499o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230316.1025 18.485o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.8483 15.160c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.8515 15.144c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.8569 15.112c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230318.8671 15.069c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0901 14.676o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.0933 14.694o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1038 14.721o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230320.1092 14.747o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.7993 14.724c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.8020 14.746c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.8025 14.704c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.8061 14.719c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.8109 14.710c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.8132 14.691c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.8214 14.568c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230322.8237 14.545c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27534] TCPJ06461075+2502415: starting to show superhumps?
by Taichi Kato 23 Mar '23

23 Mar '23

TCPJ06461075+2502415: starting to show superhumps? The most recent data by Itoh-san (Mar. 22) showed brightening and a possible sign of emerging superhumps. Ordinary superhumps appear to be emerging now.

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